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GM's OnStar team would really like us to stay on the electric side of the Chevy Volt's powertrain as much as possible. That's the selling point, after all. Rather than simply preach green driving and hope for the best, the division is testing a new EcoHub app that reminds Volt drivers just how miserly their plug-in hybrids can be. Qualifying owners who opt in or subscribe to OnStar have the Volt's energy usage costs compared to their home's total electricity bill, showing how much cheaper it can be to avoid the gas pump. There's more if money isn't enough of a motivator -- the app also builds in a counter that estimates how much gas Volt drivers are saving nationwide. The eco-friendly ego boost is currently limited to Android users participating in Pecan Street's smart grid project in Austin, but long-term plans have the app reaching iOS and all Volt fans eager to justify their ride.

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How Much is Your Charge Charging You?

OnStar's new EcoHub connected app shows cost of Volt charging

AUSTIN, Texas – OnStar is testing an app capable of telling Chevrolet Volt owners how much it costs to charge their battery – and compare the Volt's energy use with the total energy consumed in their home by day, month or year.

The new app, called EcoHub, will initially be tested with and available to residents of the Pecan Street demonstration project, a smart grid living community in Austin.

"For the first time we're able to put one of our Smart Grid solutions into the hands of actual consumers, thanks in part to our partnership with Pecan Street," said Paul Pebbles, global manager, Electric Vehicle and Smart Grid Services. "Down the line, we hope this app can be a beneficial tool for all drivers of electric vehicles."

The EcoHub app works by pulling overall home energy usage data, provided by an energy data source, such as a utility or smart meter company. The app also collects Volt charging information from OnStar subscribers and Volt owners who opt in for EcoHub. The energy use data is then aggregated to show vehicle owners exactly how much energy is being used on a daily, monthly or yearly basis, while showing what percentage of that energy went to charging the Volt. Based on electricity rates, the data is broken down to show the cost of both total energy usage and Volt charging energy use.

The 2013 Volt can travel an average of 38 miles on one full electric charge before its onboard gas-powered electric generator seamlessly switches on.

"We've found that Volt owners love to keep track of and compare their personal driving stats, like electric miles driven for example," said Cristi Landy, Chevrolet Volt marketing director. "The EcoHub app is another great example of using the vehicle's embedded technology to provide Volt owners with useful information."

In addition, the EcoHub app will include a "Ticker" screen that shows drivers the national values for Total Miles Driven, Total EV Miles Driven and Gallons of Fuel Saved.

"The 'Ticker' screen is a nice addition because it allows drivers to see that they are part of a national effort to reduce fuel use by contributing to the growing number of electric miles driven." said Pebbles.

While the app will be tested with and only be available to Volt drivers in Pecan Street project at first, OnStar hopes to make the app available for all Volt owners in the near future.

OnStar's Smart Grid research is made possible by the U.S. Department of Energy.